To purchase private property, the government must pay:
more than the market value
less than the market value
never the market value
at least the market value

The more suitable answer is *at least the market value.

Explanation:

It is accepted and required by law that the government should pay the fair value of that property to the parties when the government is purchasing property. Moreover, the consent of the seller is needed as well.

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else